June 21, 2011
Firefox 5 released
MozillaThe organization behind Firefox — advocates open web standards and internet privacy. released FirefoxMozilla's open-source browser — championed web standards and challenged Internet Explorer's dominance. 5 on June 21, 2011 — the first version on the rapid release schedule with faster update cadence.
What it was for
FirefoxMozilla's open-source browser — championed web standards and challenged Internet Explorer's dominance. 5 shipped Do Not Track headers and CSSCascading Style Sheets — the language for layout, color, and typography on web pages. animation improvements as MozillaThe organization behind Firefox — advocates open web standards and internet privacy. moved to six-week release cycles like ChromeGoogle's web browser — built on Chromium and the most widely used browser worldwide.. Web developers tested against fresher browser versions but faced faster breaking changes in vendor prefixes and APIs.
Companies
- Mozilla
Why it's here
FirefoxMozilla's open-source browser — championed web standards and challenged Internet Explorer's dominance. 5 kicked off MozillaThe organization behind Firefox — advocates open web standards and internet privacy.'s rapid release model matching ChromeGoogle's web browser — built on Chromium and the most widely used browser worldwide.'s pace.
Why it mattered
It accelerated how quickly web platform features reached users — for better and worse.
What it solved
Year-long FirefoxMozilla's open-source browser — championed web standards and challenged Internet Explorer's dominance. releases left users waiting for security fixes and new web APIs.
Media
ImageFirefox ExtensionsPentadact, CC BY-SA 2.0, via flickr
Related
- Firefox 6 releasedAugust 16, 2011
- Google Chrome beta releasedSeptember 2, 2008